10020421240 has 16 divisors (see below), whose sum is σ = 22545947880. Its totient is φ = 4008168480.

The previous prime is 10020421211. The next prime is 10020421249. The reversal of 10020421240 is 4212402001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10020421249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125255226 + ... + 125255305.

Almost surely, 2^10020421240 is an apocalyptic number.

10020421240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10020421240 is an abundant number, since it is smaller than the sum of its proper divisors (12525526640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10020421240 is a wasteful number, since it uses less digits than its factorization.

10020421240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250510542 (or 250510538 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 10020421240 its reverse (4212402001), we get a palindrome (14232823241).

The spelling of 10020421240 in words is "ten billion, twenty million, four hundred twenty-one thousand, two hundred forty".